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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 378 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.33 × 8 =
  2. 2.74 × 4 =
  3. 3.14 × 4 =
  4. 4.13 × 8 =
  5. 5.16 × 4 =
  6. 6.13 × 4 =
  7. 7.19 × 8 =
  8. 8.52 × 4 =
  9. 9.29 × 4 =
  10. 10.32 × 8 =
  11. 11.64 × 4 =
  12. 12.75 × 4 =
  13. 13.15 × 8 =
  14. 14.26 × 4 =
  15. 15.33 × 4 =
  16. 16.41 × 4 =
  17. 17.27 × 8 =
  18. 18.29 × 8 =
  19. 19.12 × 8 =
  20. 20.16 × 8 =
  21. 21.69 × 4 =
  22. 22.23 × 8 =
  23. 23.39 × 4 =
  24. 24.21 × 8 =
  25. 25.58 × 4 =
  26. 26.57 × 4 =
  27. 27.36 × 8 =
  28. 28.20 × 8 =
  29. 29.14 × 8 =
  30. 30.63 × 4 =
  31. 31.36 × 4 =
  32. 32.42 × 4 =
  33. 33.40 × 8 =
  34. 34.67 × 4 =
  35. 35.39 × 8 =
  36. 36.25 × 8 =
  37. 37.60 × 4 =
  38. 38.15 × 4 =
  39. 39.55 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 264
  2. 296
  3. 56
  4. 104
  5. 64
  6. 52
  7. 152
  8. 208
  9. 116
  10. 256
  11. 256
  12. 300
  13. 120
  14. 104
  15. 132
  16. 164
  17. 216
  18. 232
  19. 96
  20. 128
  21. 276
  22. 184
  23. 156
  24. 168
  25. 232
  26. 228
  27. 288
  28. 160
  29. 112
  30. 252
  31. 144
  32. 168
  33. 320
  34. 268
  35. 312
  36. 200
  37. 240
  38. 60
  39. 220
  40. 176

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